Topic
Gas metal arc welding
About: Gas metal arc welding is a research topic. Over the lifetime, 11706 publications have been published within this topic receiving 109555 citations. The topic is also known as: metal active gas welding & GMAW.
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TL;DR: In this article, a generation chamber and sampling system was designed to characterize aerosols from a popular welding system that utilized either gas metal arc welding or flux cored arc welding techniques and the results demonstrated that the welding alloy had a marked effect on the particle size distribution, morphology and chemical aspects of the resultant fume.
198 citations
TL;DR: In this article, the effects of pulsed gas tungsten arc welding parameters on the morphology of additive layer manufactured Ti6Al4V has been investigated and it was found that the wire feed rate has a considerable effect on the prior beta grain refinement at a given heat input.
Abstract: The effects of pulsed gas tungsten arc welding parameters on the morphology of additive layer manufactured Ti6Al4V has been investigated in this study. The peak/base current ratio and pulse frequency are found to have no significant effect on the refinement of prior beta grain size. However, it is found that the wire feed rate has a considerable effect on the prior beta grain refinement at a given heat input. This is due to the extra wire input being able to supply many heterogeneous nucleation sites and also results in a negative temperature gradient in the front of the liquidus which blocks the columnar growth and changes the columnar growth to equiaixal growth.
197 citations
TL;DR: In this article, the wave control characteristics and its droplet transfer process were analyzed by sensing and image method, and the results show that it can realize no-spatter welding and low heat input during welding process.
197 citations
01 Jan 2013-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the properties of the Ti6Al4V titanium alloy joints between pulsed Nd:YAG laser beam welding and traditional fusion welding were compared, and it can be concluded that pulsed nd:yAG laser welding is much more suitable for welding the thin titanium alloy plate than TIG welding.
Abstract: This paper reports on a study aiming at comparing properties of the Ti6Al4V titanium alloy joints between pulsed Nd:YAG laser welding and traditional fusion welding. To achieve the research purpose, Ti6Al4V titanium alloy plates with a thickness of 0.8 mm were welded using pulsed Nd:YAG laser beam welding (LBW) and gas tungsten arc welding (TIG), respectively. Residual distortions, weld geometry, microstructure and mechanical properties of the joints produced with LBW and TIG welding were compared. During the tensile test, with the aid of a high speed infrared camera, evolution of the plastic strain within tensile specimens corresponding to LBW and TIG welding were recorded and analyzed. Compared with the TIG, the welded joint by LBW has the characters of small overall residual distortion, fine microstructure, narrow heat-affected zone (HAZ), high Vickers hardness. LBW welding method can produce joints with higher strength and ductility. It can be concluded that Pulsed Nd:YAG laser welding is much more suitable for welding the thin Ti6Al4V titanium alloy plate than TIG welding.
196 citations
TL;DR: In this article, a new complex Fe-Cr-W-Mo-Nb alloy with high boron content was set into comparison with lower alloyed materials on basis Fe−Cr-B-C, a synthetic multiphase alloy on iron base with around 50.1% tungsten carbides and a crack free martensitic Fe•Cr-C alloy containing finely precipitated Niobium carbides.
192 citations